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Finding the Fourth Proportional to 45,337.40, 67,981.80 and 19,012.40

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Solution

The fourth proportional to 45,337.40, 67,981.80 and 19,012.40 is: 28,508.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,337.40 : 67,981.80 = 19,012.40 : x
  2. Step 2: Convert to fraction form
    45,337.40/67,981.80 = 19,012.40/x
  3. Step 3: Cross multiply
    45,337.40x = 67,981.80 × 19,012.40
  4. Step 4: Simplify right side
    45,337.40x = 1,292,497,174.32
  5. Step 5: Solve for x
    x = 1,292,497,174.32/45,337.40
  6. Step 6: Final answer
    x = 28,508.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.